Well, the good news. I like the cars.
Bad news. Though minor, both cars look identical, different paint and decal schemes, but the bodies are the same, even though one is marked as a Dodge, and the other a Chevrolet.
The major dissappointment however, was that they would not run on my Ninco track. Which, I have pretty much decided to replace with something else, maybe Scalextric. One problem is the slot width. Even after dremeling out the width of my track slots some time ago, I still had to file down the guides on the Carrera Go cars. And then, because Ninco rails are just above the track surface, and Ninco is so soft of a plastic, it rarely lays completely flat, the cars high centered on the rails in the turns! After over an hour of trying to fuss with the cars to get them to run, I gave up. Gave up on Ninco track anyway.
Hopefully in a short while, with a new track, I can report again what I think of the cars.
Finishing second, isn't much better than finishing at all........ (I believe a David Pearson quote)